1. School of Mathematical Sciences, Universiti Sains Malaysia, 11800, Penang, Malaysia. & School of Mathematics Engineering and Technology, Navajo Technical University, Lowerpoint Rd State Hwy 371 Crownpoint NM, 87313, USA.
2. School of Mathematical Sciences, Universiti Sains Malaysia, 11800, Penang, Malaysia.
3. Department of Mathematics, The University of Jordan, 11942, Amman, Jordan. & Jadara University Research Center, Jadara University, 21110, Irbid, Jordan.